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5 maj 2023 · Learn how to use a single dipole antenna on multiple HF bands using different methods, such as harmonic resonances, multiple dipoles, tuned antennas, and more. See examples, diagrams, and tips for each method.
Here is a fairly simple and easy to build multi band horizontal fan type dipole that can be constructed for all band operation from 160 meters up thru 6 meters or even higher. In the drawing above, it is shown for just four bands, 80 thru 10. One separate dipole for each band needed.
Multiband antenna #5 - the "fan" dipole. This is really just the simple dipole but a bunch of them, all using the same center insulator and feed line. Yes, you just cut wire dipoles for each band you wish to operate (40 and 15 can use the same one), attach them all to the center insulator and feed line and scurry from band to band with ease.
12 mar 2022 · Antenna Measurement. The best way to measure a homemade antenna is to use either an antenna analyzer or NanoVNA. Both of these devices will show you return loss or SWR in your band of interest, and you can see in real-time how shortening the antenna elements changes the resonant frequency.
classic multiband dipole antenna. Power is fed at the center through a length of 450-ohm windowed ladder line. The ladder line connects to a balun that converts the impedance to a lower value for the antenna tuner. Finally, the tuner connects to the transceiver. ARRL1989 1
Multiband dipoles offer a variety of size, feed-line, pattern, bandwidth, band-switching and other options. You’ll also find differences in complexity and efficiency.
The Kelemen multiband dipoles are dipole antennas that try to achieve a reasonable compromise between length and available bands. In addition, the weight should be kept as low as possible due to the blocking circuits (traps), while still achieving good durability and robustness.
